WPF Data Binding object properties to text box by object name?

Question

Good Evening,

i have a simple Problem:

I know that I can bind objects in Context of Data like this:

//Class CustomObject with a Property named "Property" with value "obj1"
CustomObject obj1 = new CustomObject("obj1");
DataContext = obj1;
<TextBox Text="{Binding Property}"

This works. But what is when I ve more than one object of a class. I tried something like this:

<TextBox Text="{Binding obj1.Property}"

Unfortunatly it doesnt work. Know anyone how I can bind by object Name?

Thanks.

Edit: In C# its working with this Code:

CustomObject obj1 = new CustomObject("Test");
Binding myBinding = new Binding();
myBinding.Path = new PropertyPath("Property");
myBinding.Source = obj1;
textBox1.SetBinding(TextBox.TextProperty, myBinding);

So I tried the same in XAML, unfortunatly not sucessfully:

 <TextBox Text="{Binding Property, Source=Obj1}"/>

AdamTCox · Accepted Answer · 2019-04-19 23:01:36Z

1

Try This:

<TextBox DataContext="{Binding Path=Obj1, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}}" Text="{Binding Property}"/>

In this example Obj1 would be a property of whatever window you are working programming. Obj2 would also be a property if you were planning on binding it to another textbox in the same window and so on ...

answered Apr 19, 2019 at 23:01

AdamTCox

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Clemens · Accepted Answer · 2019-04-20 07:08:14Z

0

You would create a view model class that holds the CustomObject instance as one it its properties.

public class MyViewModel
{
    public CustomObject Obj1 { get; set } 
    // declare other properties ...
}

Then assign an instance of the view model to the window's DataContext

var obj1 = new CustomObject("obj1");
var vm = new MyViewModel
{
    Obj1 = obj1
    // assign other properties ...
};
DataContext = vm;

Now bind to it like this:

<TextBox Text="{Binding Obj1.Property}" />

answered Apr 20, 2019 at 7:08

Clemens

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2 Comments

user10419906 Over a year ago

I don't want to use the mvvm pattern. I edited the Question - maybe you know the way how to do it? Thanks

Clemens Over a year ago

As there can only be one object in the Window's DataContext, you'll have to assign an instance of a class with such properties. Alternatively, you could assign a CustomObject to the TextBox's DataContext in code behind.

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